Nanocrystalline Fe{endash}M{endash}B{endash}Cu (M=Zr,Nb) alloys with improved soft magnetic properties
- Central Research Laboratory, Alps Electric Co., Ltd., Nagaoka 940 (Japan)
- Institute for Materials Research, Tohoku University, Sendai 980-77 (Japan)
The soft magnetic properties of the nanocrystalline Fe{endash}M{endash}B (M=Zr,Nb) alloys, which exhibit a high saturation flux density (B{sub s}) above 1.5 T as well as a high effective permeability ({mu}{sub e}) above 30000 at 1 kHz, were found to be improved by adding small amounts of Cu and by optimizing the chemical composition. The addition of Cu to the alloys decreases the bcc grain size. The excellent soft magnetic properties (a high {mu}{sub e} of 100000 at 1 kHz combined with a high B{sub s} of 1.53 T) can be achieved in the region where small grain size, as well as nearly zero-magnetostriction are obtained, which is attained in the compositional range around Fe{sub 84}Nb{sub 3.5}Zr{sub 3.5}B{sub 8}Cu{sub 1}. The soft magnetic properties can be further improved by low temperature annealing before the crystallization treatment, probably as a result of a decreased grain size distribution in the crystallized state. Consequently, the {mu}{sub e} reaches the maximum value of 120000 for the nanocrystalline Fe{sub 84}Nb{sub 3.5}Zr{sub 3.5}B{sub 8}Cu{sub 1} alloy. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 467228
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 6 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
The relationship between the crystallization process and the soft magnetic properties of nanocrystalline Fe{endash}M{endash}B{endash}Cu (M=Zr, Nb) alloy
Magnetic properties of HITPERM (Fe;Co){sub 88}Zr{sub 7}B{sub 4}Cu{sub 1} magnets